節(ふし)

ふし
noun
joint, knot; tune, melody; point, moment
1. joint, knot, node
A point where segments connect, such as bamboo joints or finger joints.
You can see the joints of the bamboo.
My finger joints are thick.
This board has many knots and is hard to use.
2. tune, melody
A musical melody or the way something is sung.
To sing in an old-fashioned melody.
He read it aloud with a distinctive melody.
節(ふし)をつける = to set to a tune, to add a melody
I still remember the tune my grandmother used to hum.
3. point, moment, occasion
A particular instance or aspect of something.
There are suspicious aspects to his story.
Something comes to mind.
思(おも)い当(あ)たる節(ふし) = something one can think of, a point that rings a bell
There were several points at which I felt his attitude had changed recently.

Multiple meanings centered around points of connection or division.

COMMON COLLOCATIONS (sense 1, joints and knots):

COMMON COLLOCATIONS (sense 2, melody):

COMMON COLLOCATIONS (sense 3, point or aspect):

WATCH OUT (different reading):